Init session - Is TCP 3 way handshake gets completed here?

cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 
Announcements

Init session - Is TCP 3 way handshake gets completed here?

Cyber Elite
Cyber Elite

 

Init session info

 

Does TCP 3 way handshake gets started and completed here?

MP

Help the community: Like helpful comments and mark solutions.
1 accepted solution

Accepted Solutions

Yep. When the first packet (a SYN for a TCP connection) is assigned a session ID it moves from INIT to Opening then almost immediately to Active.

 

You would be lucky to get a "show session id" output that has any of the transient states, they're super fast. Microseconds fast.

View solution in original post

3 REPLIES 3

L7 Applicator

Init means it's not an active session. Full breakdown here:

https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000Clk9CAC

 

Short answer: when a session ends, the session state retuns to INIT. You can still see the most recent session details that used that particular session ID until new traffic allocates that ID.

Seems my understanding is that tcp 3 way handshake happens in active stage ?

Need to confirm with you?

MP

Help the community: Like helpful comments and mark solutions.

Yep. When the first packet (a SYN for a TCP connection) is assigned a session ID it moves from INIT to Opening then almost immediately to Active.

 

You would be lucky to get a "show session id" output that has any of the transient states, they're super fast. Microseconds fast.

  • 1 accepted solution
  • 4086 Views
  • 3 replies
  • 0 Likes
Like what you see?

Show your appreciation!

Click Like if a post is helpful to you or if you just want to show your support.

Click Accept as Solution to acknowledge that the answer to your question has been provided.

The button appears next to the replies on topics you’ve started. The member who gave the solution and all future visitors to this topic will appreciate it!

These simple actions take just seconds of your time, but go a long way in showing appreciation for community members and the LIVEcommunity as a whole!

The LIVEcommunity thanks you for your participation!